when one form of energy is converted to another form of energy ?

Question

a) a small amount of energy is destroyed
b) a small amount of energy is created
c) the total amount of energy remains the same
d) the total energy can be either increase or decrease

Answer 1

Energy cannot be created or destroyed, only changed from one form to another.
Figure out the answer from that sentence.

Answer 2

False. By definition, the law of conservation of energy states that "energy cannot be created or destroyed, it can only be converted to another form". An example of this is light bulb, which, when turned on converts the inputted electrical energy to light (which is a radiant, electromagnetic energy) but some energy is also converted to heat that the filament gives off. So basically energy is NEVER created or destroyed, the amount of energy in the universe at the big bang is the same as the amount of energy now.

Answer 3

C.

"The total amount of energy remains the same."

Energy is never destroyed!

Here's a selection from Wikipedia that explains it:

"Energy is converted from one form to another, but it is never created or destroyed. This principle, the conservation of energy, was first postulated in the early 19th century, and applies to any isolated system. According to Noether's theorem, the conservation of energy is a consequence of the fact that the laws of physics do not change over time.[2]

Although the total energy of a system does not change with time, its value may depend on the frame of reference. For example, a passenger in a moving airplane has zero kinetic energy relative to the airplane, but nonzero kinetic energy relative to the earth."

Answer 4

a. b. and d. are definitely false. So therefor c. must be right. What you may be confused about is entropy, this is where a small or large amount of energy escapes from "man-made" energy forms i.e. the loss of electricity do to long distance transmission lines. This energy is lost in the form of heat energy. Thus it is still energy just not electricity.

Answer 5

I assume that this is some homework question - answer C is correct.

But energy can be created. E=mc^2 / all nuclear power. The weight of Uranium before fission does not equal the weight of the products of the reaction.

Edit: I think I should provide more clarification before I get jumped;

E=mc^2 states that matter and energy are equivalent. This is the basis of nuclear energy, and currently we can only create energy through the destruction of matter. It also shows that we should be able to create matter through energy, however we cannot yet.

Answer 6

The Law of Conservation of Energy states that energy can neither be created or destroyed. Therefor the total energy in the system is constant--C

Answer 7

C is the answer
According to the las of conservation of energy:
ENergy cannot be created or destroyed; it can only be converted from one form to another

Answer 8

In almost every process of changing one form to another, there are losses. It is normally in the form of heat loss due to friction and/or chemical reaction. Examples are a Power Plant is only about 30-40 percent efficient in changing the fuel into electric power. Motors are anly 80-90% efficient. Even Batteries are not efficient in storing energy.

Answer 9

Due to losses, some is converted into less useful forms - usually heat.
Systems or machines are rated for efficiency in converting one form into another; so a motor drawing 100w may only be doing 70w of work, the remainder being lost as heat, noise, vibration, air movement, and wear. C .

Answer 10

c) the total amount of energy remains the same